The sign was ____ because much of the lettering had worn away. ( )(本题2.5分)
A、 irregular
B、 illegal
C、 illegible
D、 irrelevant
出自:西安石油大学-石油工程技术-大学英语I(上)

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块